Hello
I'm using SFTP Client to access remote deices using SSH. I'm trying to access my devices,. i.e. Cisco Routers or switches. always failed to connect and I'm getting the below in debug mode. tried hard with no luck. I wrote to SFTP App with no response.

Note that I'm using MacBook Pro Big Sur and have no issues with other SFTP clients/SSH clients. the issues is only with SFTP Client

Log Type,Log Message,Date,Time
DEBUG,"Parser: IN_PACKETBEFORE (expecting 16)",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAAFTER, packet: CHANNEL_DATA (0)",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAVERIFY (Valid HMAC)",18-2-2021,12:57:28
DEBUG,"Parser: Verifying MAC",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAVERIFY",18-2-2021,12:57:28
DEBUG,"Parser: HMAC size:20",18-2-2021,12:57:28
DEBUG,"Parser: Decrypting",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATA",18-2-2021,12:57:28
DEBUG,"Parser: pktLen:28,padLen:6,remainLen:16",18-2-2021,12:57:28
DEBUG,"Parser: Decrypting",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKET",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETBEFORE (expecting 16)",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAAFTER, packet: CHANNEL_DATA (0)",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAVERIFY (Valid HMAC)",18-2-2021,12:57:28
DEBUG,"Parser: Verifying MAC",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAVERIFY",18-2-2021,12:57:28
DEBUG,"Parser: HMAC size:20",18-2-2021,12:57:28
DEBUG,"Parser: Decrypting",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATA",18-2-2021,12:57:28
DEBUG,"Parser: pktLen:332,padLen:15,remainLen:320",18-2-2021,12:57:28
DEBUG,"Parser: Decrypting",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKET",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETBEFORE (expecting 16)",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAAFTER, packet: CHANNEL_SUCCESS (0)",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAVERIFY (Valid HMAC)",18-2-2021,12:57:28
DEBUG,"Parser: Verifying MAC",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAVERIFY",18-2-2021,12:57:28
DEBUG,"Parser: HMAC size:20",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATA",18-2-2021,12:57:28
DEBUG,"Parser: pktLen:12,padLen:6,remainLen:0",18-2-2021,12:57:28
DEBUG,"Parser: Decrypting",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKET",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETBEFORE (expecting 16)",18-2-2021,12:57:28
DEBUG,"Outgoing: Writing CHANNEL_REQUEST (3, shell)",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAAFTER, packet: CHANNEL_SUCCESS (0)",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAVERIFY (Valid HMAC)",18-2-2021,12:57:28
DEBUG,"Parser: Verifying MAC",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAVERIFY",18-2-2021,12:57:28
DEBUG,"Parser: HMAC size:20",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATA",18-2-2021,12:57:28
DEBUG,"Parser: pktLen:12,padLen:6,remainLen:0",18-2-2021,12:57:28
DEBUG,"Parser: Decrypting",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKET",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETBEFORE (expecting 16)",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAAFTER, packet: CHANNEL_OPEN_FAILURE",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAVERIFY (Valid HMAC)",18-2-2021,12:57:28
DEBUG,"Parser: Verifying MAC",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAVERIFY",18-2-2021,12:57:28
DEBUG,"Parser: HMAC size:20",18-2-2021,12:57:28
DEBUG,"Parser: Decrypting",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATA",18-2-2021,12:57:28
DEBUG,"Parser: pktLen:28,padLen:10,remainLen:16",18-2-2021,12:57:28
DEBUG,"Parser: Decrypting",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKET",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETBEFORE (expecting 16)",18-2-2021,12:57:28
DEBUG,"Outgoing: Writing CHANNEL_REQUEST (3, pty-req)",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAAFTER, packet: CHANNEL_OPEN_CONFIRMATION",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAVERIFY (Valid HMAC)",18-2-2021,12:57:28
DEBUG,"Parser: Verifying MAC",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAVERIFY",18-2-2021,12:57:28
DEBUG,"Parser: HMAC size:20",18-2-2021,12:57:28
DEBUG,"Parser: Decrypting",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATA",18-2-2021,12:57:28
DEBUG,"Parser: pktLen:28,padLen:10,remainLen:16",18-2-2021,12:57:28
DEBUG,"Parser: Decrypting",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKET",18-2-2021,12:57:28
DEBUG,"Outgoing: Writing CHANNEL_OPEN (1, session)",18-2-2021,12:57:28
DEBUG,"Outgoing: Writing CHANNEL_OPEN (0, session)",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETBEFORE (expecting 16)",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAAFTER, packet: USERAUTH_SUCCESS",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAVERIFY (Valid HMAC)",18-2-2021,12:57:28
DEBUG,"Parser: Verifying MAC",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAVERIFY",18-2-2021,12:57:28
DEBUG,"Parser: HMAC size:20",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATA",18-2-2021,12:57:28
DEBUG,"Parser: pktLen:12,padLen:10,remainLen:0",18-2-2021,12:57:28
DEBUG,"Parser: Decrypting",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKET",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETBEFORE (expecting 16)",18-2-2021,12:57:28
DEBUG,"Outgoing: Writing USERAUTH_REQUEST (password)",18-2-2021,12:57:28
DEBUG,"Client: none auth failed",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAAFTER, packet: USERAUTH_FAILURE",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAVERIFY (Valid HMAC)",18-2-2021,12:57:28
DEBUG,"Parser: Verifying MAC",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAVERIFY",18-2-2021,12:57:28
DEBUG,"Parser: HMAC size:20",18-2-2021,12:57:28
DEBUG,"Parser: Decrypting",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATA",18-2-2021,12:57:28
DEBUG,"Parser: pktLen:60,padLen:14,remainLen:48",18-2-2021,12:57:28
DEBUG,"Parser: Decrypting",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKET",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETBEFORE (expecting 16)",18-2-2021,12:57:28
DEBUG,"Outgoing: Writing USERAUTH_REQUEST (none)",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAAFTER, packet: SERVICE_ACCEPT",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAVERIFY (Valid HMAC)",18-2-2021,12:57:28
DEBUG,"Parser: Verifying MAC",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAVERIFY",18-2-2021,12:57:28
DEBUG,"Parser: HMAC size:20",18-2-2021,12:57:28
DEBUG,"Parser: Decrypting",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATA",18-2-2021,12:57:28
DEBUG,"Parser: pktLen:28,padLen:10,remainLen:16",18-2-2021,12:57:28
DEBUG,"Parser: Decrypting",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKET",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETBEFORE (expecting 16)",18-2-2021,12:57:28
DEBUG,"Outgoing: Writing SERVICE_REQUEST (ssh-userauth)",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAAFTER, packet: NEWKEYS",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATA",18-2-2021,12:57:28
DEBUG,"Parser: pktLen:12,padLen:10,remainLen:8",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKET",18-2-2021,12:57:28
DEBUG,"Outgoing: Writing NEWKEYS",18-2-2021,12:57:28
DEBUG,"Verifying signature",18-2-2021,12:57:28
DEBUG,"Host accepted (verified)",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETBEFORE (expecting 8)",18-2-2021,12:57:28
DEBUG,"Verifying host fingerprint",18-2-2021,12:57:28
DEBUG,"Checking signature format",18-2-2021,12:57:28
DEBUG,"Checking host key format",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATAAFTER, packet: KEXDH_REPLY",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETDATA",18-2-2021,12:57:28
DEBUG,"Parser: pktLen:828,padLen:7,remainLen:824",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKET",18-2-2021,12:57:28
DEBUG,"Parser: IN_PACKETBEFORE (expecting 8)",18-2-2021,12:57:27
DEBUG,"Outgoing: Writing KEXDH_INIT",18-2-2021,12:57:27
DEBUG,"Server->Client compression algorithm: none",18-2-2021,12:57:27
DEBUG,"(remote) Server->Client compression algorithms: none",18-2-2021,12:57:27
DEBUG,"(local) Server->Client compression algorithms: none,zlib@openssh.com,zlib",18-2-2021,12:57:27
DEBUG,"Client->Server compression algorithm: none",18-2-2021,12:57:27
DEBUG,"(remote) Client->Server compression algorithms: none",18-2-2021,12:57:27
DEBUG,"(local) Client->Server compression algorithms: none,zlib@openssh.com,zlib",18-2-2021,12:57:27
DEBUG,"Server->Client HMAC algorithm: hmac-sha1",18-2-2021,12:57:27
DEBUG,"(remote) Server->Client HMAC algorithms: hmac-sha1,hmac-sha1-96",18-2-2021,12:57:27
DEBUG,"(local) Server->Client HMAC algorithms: hmac-sha2-256,hmac-sha2-512,hmac-sha1,hmac-md5,hmac-sha2-256-96,hmac-sha2-512-96,hmac-ripemd160,hmac-sha1-96,hmac-md5-96",18-2-2021,12:57:27
DEBUG,"Client->Server HMAC algorithm: hmac-sha1",18-2-2021,12:57:27
DEBUG,"(remote) Client->Server HMAC algorithms: hmac-sha1,hmac-sha1-96",18-2-2021,12:57:27
DEBUG,"(local) Client->Server HMAC algorithms: hmac-sha2-256,hmac-sha2-512,hmac-sha1,hmac-md5,hmac-sha2-256-96,hmac-sha2-512-96,hmac-ripemd160,hmac-sha1-96,hmac-md5-96",18-2-2021,12:57:27
DEBUG,"Server->Client Cipher: aes128-ctr",18-2-2021,12:57:27
DEBUG,"(remote) Server->Client ciphers: aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc,aes192-cbc,aes256-cbc",18-2-2021,12:57:27
DEBUG,"(local) Server->Client ciphers: aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm,aes128-gcm@openssh.com,aes256-gcm,aes256-gcm@openssh.com,aes256-cbc,aes192-cbc,aes128-cbc,blowfish-cbc,3des-cbc,arcfour256,arcfour128,cast128-cbc,arcfour",18-2-2021,12:57:27
DEBUG,"Client->Server Cipher: aes128-ctr",18-2-2021,12:57:27
DEBUG,"(remote) Client->Server ciphers: aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc,aes192-cbc,aes256-cbc",18-2-2021,12:57:27
DEBUG,"(local) Client->Server ciphers: aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm,aes128-gcm@openssh.com,aes256-gcm,aes256-gcm@openssh.com,aes256-cbc,aes192-cbc,aes128-cbc,blowfish-cbc,3des-cbc,arcfour256,arcfour128,cast128-cbc,arcfour",18-2-2021,12:57:27
DEBUG,"Host key format: ssh-rsa",18-2-2021,12:57:27
DEBUG,"(remote) Host key formats: ssh-rsa",18-2-2021,12:57:27
DEBUG,"(local) Host key formats: ssh-rsa,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-dss",18-2-2021,12:57:27
DEBUG,"KEX algorithm: diffie-hellman-group14-sha1",18-2-2021,12:57:27
DEBUG,"(remote) KEX algorithms: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1",18-2-2021,12:57:27
DEBUG,"(local) KEX algorithms: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group14-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha1",18-2-2021,12:57:27
DEBUG,"Comparing KEXINITs ...",18-2-2021,12:57:27
DEBUG,"Parser: IN_PACKETDATAAFTER, packet: KEXINIT",18-2-2021,12:57:27
DEBUG,"Parser: IN_PACKETDATA",18-2-2021,12:57:27
DEBUG,"Parser: pktLen:364,padLen:5,remainLen:360",18-2-2021,12:57:27
DEBUG,"Parser: IN_PACKET",18-2-2021,12:57:27
DEBUG,"Parser: IN_PACKETBEFORE (expecting 8)",18-2-2021,12:57:27
DEBUG,"Outgoing: Writing KEXINIT",18-2-2021,12:57:27
DEBUG,"Remote ident: 'SSH-1.99-Cisco-1.25'",18-2-2021,12:57:27
DEBUG,"Parser: IN_HEADER",18-2-2021,12:57:27
DEBUG,"Parser: IN_GREETING",18-2-2021,12:57:27
DEBUG,"Parser: IN_INIT",18-2-2021,12:57:27
DEBUG,"Client: Connected",18-2-2021,12:57:27
DEBUG,"Client: Trying 192.168.51.1 on port 22 ...",18-2-2021,12:57:27
DEBUG,"Local ident: 'SSH-2.0-ssh2js0.4.10'",18-2-2021,12:57:27